I want to know how this affects Apple's position re: in app purchase on things like Kindle app, Sony ereader app, Grooveshark, Rhapsody, etc... I just can't be

I want to know how this affects Apple's position re: in app purchase on things like Kindle app, Sony ereader app, Grooveshark, Rhapsody, etc... I just can't believe that they didn't see this coming.